/*
 * Copyright (c) 2012 Robert Burrell Donkin robertburrelldonkin.name
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
 * and associated documentation files (the "Software"), to deal in the Software without restriction, 
 * including without limitation the rights to use, copy, modify, merge, publish, distribute, 
 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software 
 * is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all copies or 
 * substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 */
package sekhmet.audio.format;

import java.io.IOException;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;

import org.apache.commons.io.IOUtils;

import sekhmet.audio.data.AudioData;


class StreamReader extends BufferingReader implements AudioReader {

	private final AudioInputStream in;
	private final int bufferSize;
	
	private long startFrame = 0;
	
	public StreamReader(AudioInputStream in, int bufferSize) {
		super();
		this.in = in;
		this.bufferSize = bufferSize;
	}

	@Override
	public AudioReader close() {
		IOUtils.closeQuietly(in);
		return this;
	}

	public AudioData read() throws IOException {
		final byte[] buffer = new byte[bufferSize];
		final int numberOfBytesRead = in.read(buffer);
		final AudioFormat format = in.getFormat();
		final AudioData data = build(format, startFrame, buffer, numberOfBytesRead);
		startFrame = nextFrame(data);
		return data;
	}
}
